static int __init hsdk_tweak_node_coherency()

in plat-hsdk/platform.c [88:122]

• 25 lines of code
• 10 McCabe index (conditional complexity)

static int __init hsdk_tweak_node_coherency(const char *path, bool coherent)
{
	void *fdt = initial_boot_params;
	const void *prop;
	int node, ret;
	bool dt_coh_set;

	node = fdt_path_offset(fdt, path);
	if (node < 0)
		goto tweak_fail;

	prop = fdt_getprop(fdt, node, "dma-coherent", &ret);
	if (!prop && ret != -FDT_ERR_NOTFOUND)
		goto tweak_fail;

	dt_coh_set = ret != -FDT_ERR_NOTFOUND;
	ret = 0;

	/* need to remove "dma-coherent" property */
	if (dt_coh_set && !coherent)
		ret = fdt_delprop(fdt, node, "dma-coherent");

	/* need to set "dma-coherent" property */
	if (!dt_coh_set && coherent)
		ret = fdt_setprop(fdt, node, "dma-coherent", NULL, 0);

	if (ret < 0)
		goto tweak_fail;

	return 0;

tweak_fail:
	pr_err("failed to tweak %s to %scoherent\n", path, coherent ? "" : "non");
	return -EFAULT;
}